Burning oil through PCV system?
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Laughing Gas
Joined: Dec 2006
Posts: 1,008
Likes: 5
Burning oil through PCV system?
I always smell oil burning when I drive my Ex.
I don't have leaky valve covers and I don't have a lot of oil on the side of the engine.
What I did notice was there was a lot of oil in the intake tract. It's coming from the tube on the left side of the engine where it connects the driver's side valve cover to the intake tube before the throttle body.
What would cause this?
My PCV valve is clean and flows one way as it should. The plunger inside moves freely.
I don't have leaky valve covers and I don't have a lot of oil on the side of the engine.
What I did notice was there was a lot of oil in the intake tract. It's coming from the tube on the left side of the engine where it connects the driver's side valve cover to the intake tube before the throttle body.
What would cause this?
My PCV valve is clean and flows one way as it should. The plunger inside moves freely.
Laughing Gas
Joined: Nov 2014
Posts: 1,118
Likes: 4
From: Idaho
I noticed a bit of oil around mine as well. I swapped it out for a new one from rock auto and cleaned the valve cover off really well. The new one didn't seem to fit as tight, but I haven't seen any more oil around it. I think that was where I was getting some of my oil consumption, but not 100% on it. I gained about 1mpg, but I also switched oil at that time, which may or may not be a factor.
Mine seemed fine when I pulled it out, the weight and stuff moved freely. Didn't seem like anything was wrong with it.
Mine seemed fine when I pulled it out, the weight and stuff moved freely. Didn't seem like anything was wrong with it.
Logistics Pro
Joined: Jan 2014
Posts: 3,595
Likes: 17
Is the oil level dropping and you're actually burning oil, or is it primarily the smell? The doghouse is a notoriously poor design for our rigs and Clay offers a CCV reroute kit that allows you to vent to atmosphere instead of recirculating into the intake. I always have a puddle of oil in my intake tract whenever I pull the filter for other maintenance or upgrades. You can make your own reroute quite cheap, a lot of people add a catch can to it so the vapors and oil droplets aren't just purged onto the ground.
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Laughing Gas
Joined: Dec 2006
Posts: 1,008
Likes: 5
Welp, I'm burning it.
Oil Pressure gauge dropped to 0 and I pulled over, luckily right at a Wal*Mart. Dip Stick was bone dry, had to top up. Ended up taking a whole 5 quart jug.
I've only put about 2500 miles on it to. You'd think if I were burning it at that rate, I'd be putting out a spy hunter looking smoke screen. But no, no heavy smoke. And the plugs didn't look black either.
I'll run it some more see how long it takes to get down again.
Oil Pressure gauge dropped to 0 and I pulled over, luckily right at a Wal*Mart. Dip Stick was bone dry, had to top up. Ended up taking a whole 5 quart jug.
I've only put about 2500 miles on it to. You'd think if I were burning it at that rate, I'd be putting out a spy hunter looking smoke screen. But no, no heavy smoke. And the plugs didn't look black either.
I'll run it some more see how long it takes to get down again.
Laughing Gas
Joined: Jul 2010
Posts: 1,174
Likes: 2
From: Flat Rock, MI
Here's a thought...if you're pulling it through the PCV, it could be due to the splash shield coming loose in the cam cover. I had mine fall off last winter and it made a terrible noise. Since yours isn't noisy, it could be loose and allow oil to pull past it.
Here's my thread if you're interested... https://www.ford-trucks.com/forums/1...found-v10.html
Here's my thread if you're interested... https://www.ford-trucks.com/forums/1...found-v10.html
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Fleet Mechanic
Joined: Dec 2014
Posts: 1,715
Likes: 60
From: Central NH
Or, take a look at your turbocharger? I lost two quarts in under 200 miles out the exhaust. Seems you'd need an awful lot of blow by to lose that much oil out the CCV. Like rebuild your engine with that much blow by.
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Laughing Gas
Joined: Dec 2006
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Son as I sell my pickup, I'm gonna delete four cylinders and all spark plugs.
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Laughing Gas
Joined: Dec 2006
Posts: 1,008
Likes: 5
Once I discover an engine is burning/leaking as much oil as this, I switch up to Wal*Mart SuperTech 20w50 until I fix the problem.
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Laughing Gas
Joined: Dec 2006
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Likes: 5
5 quarts in around 2500 miles.
I might have underfilled it when I first changed it because I only had a new 5 quart jug and another quart and a half laying around. But I was between the upper and lower marks on the dip stick.
I'd expect my exhaust to be a thick blue haze at this rate.